Dokyuu Hentai HxEros

Synopsis

From Seven Seas:
When the alien Kiseichuu descend on Earth, they have one goal: eradicate the human race. They do so by feeding off the very passion that drives humans to reproduce, their H-Energy! Retto Enjo is recruited onto a team of elite, sexy superheroes assembled to save Earth. Living in a dorm with the four beautiful women of the HXEROS team, Retto finds himself caught up in a web of erotic intrigue where the whole world is at stake! Extraterrestrials and ecchi will collide in this ultimate battle for humanity’s debauchery!

Dear Sir Hannibal included in Vol 3.

Synopsis & details from MangaUpdates